set flags at all (i.e. through early returns) or only UNTOUCHED
flags. This breaks the positional flagging scheme, which should
have one digit for every funtion applied.

likely flag the masked values

added a calibration plot to flag_pattern, because its hard to find a suitable threshold without any feedback.

rewrite of _restoreFlags() in register.py which was needed because of a problem updating meta, which raised an index error when setting meta on an empty history

Historymeta

See merge request !284

Expose data and flag through `SaQC`

See merge request !282

the previous implementation, would only mark the start and end point(s) of a constant plateaus if it is as big as window or larger.

fix for patternrec

See merge request !191

fixed some plotting issues

See merge request !283